Hyundai Repair: bad battery already? and bald tires after one year?, high performance tires, alignment issues

Question
I have a 2003 tiburon manual .. when i heard the humming noise making right turns and accelerating i found out i had bad breaks, durin that time he showed me my rear tires were bald, which thru me off because they are only a year old, like 20,000 miles on them.. i had my tires rotated 3 months ago *so it was the front two* from the same place that changed them 3 yrs ago.. what do u suggest? and my battery also was dying when id leave the car in that other position with the radio or something if i was just sittin in line somewhere or wahtever, in less then a minute it wouldnt wanna start but would turn over, with my tires being bald and it raining for 3 days i didnt go anywhere, when i went to start it, it was completely dead, which was odd cuz i hadnt touched the car in 3 days, is there a warranty on my battery and tires and what is it?

Answer
Let's start with the battery.  Presuming it's the original battery, the warranty on the battery is 3 years/unlimited mileage.  Up to two years, it's free replacement.  After two years but up to three years, Hyundai will cover the labor and 25% of the parts; you'd owe the remaining 75% of parts.  Based on your description, you're probably correct that you need a battery.

Now, on to the tires.  Different tires are made from different compounds, some wearing faster than others.  Typically inexpensive and high performance tires wear quickly.  

Additionally, alignment issues can cause the tires to wear on one of the edges.  If the tires are worn evenly all the way across, it wasn't due to the alignment.  

Also, the front tires receive most of the wear because that's the axle where all the acceleration and nearly all the braking take place.  That's why the tires that spent most of the time on the front of the vehicle are worn out.  If you've got a heavy foot or do a lot of stop-and-go driving, that'll contribute to tire wear as well.

The warranty on your tires will be from the place where you purchased the tires.  Most tires come with a treadwear warranty.  You'll need to look at your paperwork to see what it is.  These warranties disclaim wear from spinning wheels, abuse, underinflation, or alignment issues, and sometimes require regular rotation of the tires.  In my experience, tire shops do *not* like honoring treadwear warranties.  

If they honor the treadwear warranty, they'll apply the amount of use you didn't get out of your old tires to the new ones you purchase.  For example, if the treadwear warranty was for 30,000 miles, that's be 10,000 miles you didn't get.  So if you purchased the same tires-- let's say their price is $60 each-- 10,000 miles would be one third of the wear, so they'd subtract one third of the price, making the new tire $40.